I am Mother Christmas.
DH has never written a card except mine, and I have often had to say "Where's my card, then?" before he remembers. He never buys the presents, though he is always willing to hand over his debit card, and doesn't even know what we've bought. He used to get my presents, wrapping them furtively late on Christmas Eve, but my DD started doing it for him - choosing, ordering, wrapping and even writing the gift cards . Last year, he did it himself - chocolates (good), Alexa (very good), electric toothbrush (not so good.) This year, I have bought my own.
He will go up, grumbling, into the eaves to get the decorations. He will also reluctantly put up the tree. However, he won't do any of the decorating.
I think that Christmas wouldn't happen if mums didn't make it happen.